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Finding the Fourth Proportional to 420,594.98, 580,370 and 239,329.94

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Solution

The fourth proportional to 420,594.98, 580,370 and 239,329.94 is: 330,246.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,594.98 : 580,370 = 239,329.94 : x
  2. Step 2: Convert to fraction form
    420,594.98/580,370 = 239,329.94/x
  3. Step 3: Cross multiply
    420,594.98x = 580,370 × 239,329.94
  4. Step 4: Simplify right side
    420,594.98x = 138,899,917,277.80
  5. Step 5: Solve for x
    x = 138,899,917,277.80/420,594.98
  6. Step 6: Final answer
    x = 330,246.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.